Metabolism Calculator

  • Katch-McArdle BMR Calculator
    Calculate your Basal Metabolic Rate with the Katch-McArdle formula using lean body mass and body fat percentage. Free, accurate BMR estimate.
  • Calories to Kilojoules Converter
    Convert calories (kcal) to kilojoules (kJ) and back instantly. Uses the exact factor 1 kcal = 4.184 kJ for accurate energy conversions.
  • Weight Change Predictor Calculator
    Predict your weekly weight change from daily calorie intake vs TDEE. Estimate gain or loss in pounds and kg using the 3,500 kcal-per-pound rule.
  • Calorie Macro Split Calculator
    Convert your daily calorie target and macro percentages into grams of protein, carbs and fat. Free macro split calculator with instant results.
  • MET Minutes Calculator
    Calculate MET-minutes from any activity's MET value and duration. Find per-session and weekly physical activity totals to track exercise intensity.
  • Calories Burned Weight Lifting Calculator
    Estimate calories burned weight lifting using the MET formula. Enter your body weight, workout duration, and intensity to get instant kcal results.
  • TDEE Calculator (Total Daily Energy Expenditure)
    Calculate your TDEE and BMR with the revised Harris-Benedict equation. Enter age, sex, height, weight and activity level to estimate daily calories burned.
  • Keto Macros Calculator
    Calculate your daily keto macros (fat, protein, carbs in grams) from your calorie target using a standard 70/25/5 ketogenic split.
  • Calorie Deficit Calculator
    Calculate your daily calorie deficit from TDEE and target intake, plus estimated weekly fat loss in pounds and kilograms.
  • BMR Calculator (Mifflin-St Jeor)
    Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation. Enter weight, height, age and gender to get daily resting calories plus TDEE estimates.
  • TDEE Calculator
    Calculate your Total Daily Energy Expenditure (TDEE) with this TDEE Calculator. Input gender, age, height, weight, and activity level for accurate results. Supports Harris-Benedict and Mifflin-St Jeor formulas.
  • BMR Calculator (Mifflin-St Jeor)
    Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Enter weight, height, age and gender to find daily resting calories.
  • BMR Calculator (Basal Metabolic Rate)
    Calculate your Basal Metabolic Rate (BMR) with the Mifflin-St Jeor equation. Find daily calories burned at rest plus TDEE by activity level.
  • Mifflin-St Jeor BMR Calculator
    Estimate your Basal Metabolic Rate (BMR) with the Mifflin-St Jeor equation. Enter weight (kg), height (cm), age and gender to get daily resting calories.
  • BMR Calculator
    Calculate your BMR from sex, birth year, height (cm), and weight (kg) using Harris–Benedict or Mifflin–St Jeor. Get calories/day at rest.
  • Calories Burned Calculator
    Estimate calories burned during exercise using METs, body weight, and duration. Free calories burned calculator with per-minute and per-hour totals.
  • Basal Metabolic Rate (BMR) Calculator
    Calculate your Basal Metabolic Rate (BMR) in kcal/day with the revised Harris-Benedict equation. Enter age, sex, height (cm) and weight (kg).
  • Katch-McArdle BMR Calculator
    Calculate your Basal Metabolic Rate with the Katch-McArdle formula, which uses lean body mass and body fat percentage for greater accuracy.

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